LCLS: add GCR comparison helper

Change-Id: I9e3b5560a058b976638d03cb819415d237ae9984

include/osmocom/gsm/gsm29205.h

@@ -39,3 +39,4 @@ struct osmo_gcr_parsed {
 
 uint8_t osmo_enc_gcr(struct msgb *msg, const struct osmo_gcr_parsed *g);
 int osmo_dec_gcr(struct osmo_gcr_parsed *gcr, const uint8_t *elem, uint8_t len);
+bool osmo_gcr_eq(const struct osmo_gcr_parsed *gcr1, const struct osmo_gcr_parsed *gcr2);

src/gsm/gsm29205.c

@@ -91,3 +91,24 @@ int osmo_dec_gcr(struct osmo_gcr_parsed *gcr, const uint8_t *elem, uint8_t len)
 
 	return parsed + 5;
 }
+
+/*! Compare two GCR structs.
+ *  \param[in] gcr1 pointer to the GCR struct
+ *  \param[in] gcr2 pointer to the GCR struct
+ *  \returns true if GCRs are equal, false otherwise */
+bool osmo_gcr_eq(const struct osmo_gcr_parsed *gcr1, const struct osmo_gcr_parsed *gcr2)
+{
+	if (gcr1->net_len != gcr2->net_len)
+		return false;
+
+	if (gcr1->node != gcr2->node)
+		return false;
+
+	if (memcmp(gcr1->cr, gcr2->cr, 5) != 0)
+		return false;
+
+	if (memcmp(gcr1->net, gcr2->net, gcr2->net_len) != 0)
+		return false;
+
+	return true;
+}

src/gsm/libosmogsm.map

@@ -240,6 +240,7 @@ gsm29118_create_service_abort_req;
 
 osmo_enc_gcr;
 osmo_dec_gcr;
+osmo_gcr_eq;
 
 gsm0858_rsl_ul_meas_enc;
 

tests/gsm0808/gsm0808_test.c

@@ -732,25 +732,10 @@ static void test_enc_dec_lcls()
                 abort();
         }
 
-	if (lcls_out.gcr->net_len != g.net_len) {
-		printf("Network ID length parsed wrong: %u != %u\n", lcls_out.gcr->net_len, g.net_len);
-		abort();
-	}
-
-	if (lcls_out.gcr->node != g.node) {
-		printf("Node ID parsed wrong: 0x%X != 0x%X\n", lcls_out.gcr->node, g.node);
-		abort();
-	}
-
-	if (memcmp(lcls_out.gcr->net, g.net, g.net_len) != 0) {
-		printf("Network ID parsed wrong: %s\n", osmo_hexdump(lcls_out.gcr->net, lcls_out.gcr->net_len));
-		abort();
-	}
-
-	if (memcmp(lcls_out.gcr->cr, g.cr, 5) != 0) {
-		printf("Call ref. ID parsed wrong: %s\n", osmo_hexdump(lcls_out.gcr->cr, 5));
-		abort();
-	}
+	if (!osmo_gcr_eq(lcls_out.gcr, lcls_in.gcr)) {
+		printf("GCR parsed wrong.\n");
+                abort();
+        }
 
 	printf("\tdecoded %d bytes: %s\n", rc, rc == len ? "OK" : "FAIL");
 	msgb_free(msg);